[bruinbirdman]

"The double slit Delayed Choice Quantum Eraser is an experiment that has already been done and appears to prove you can change the quantum past without going into another universe."

But, it is only a ""proposal

yitbos

[Psycho_Bunny]

The experiment's actually already been run.  There's just a question of what the results mean:  it either half-works, or doesn't work, or the expected pattern doesn't manifest when "created in the past"

But something seriously weird is happening.